Physics - August 2007

(hypothetical question)
If you have 1.8 gallons of gasoline, each which stores 100 mega Joules of energy which is released by burning the gas, and you could convert all the PE to KE of a rocket (60 kg).
☺ how fast would the rocket travel?
☺ if converted to gravitational PE how high could you fire the rocket?

2007-08-09 04:58:09 · 4 answers · asked by benzene boy 1

It seems like I heard somewhere before it was because it had to be just one frequency of light, but I tried it with my red led light and still no interference.

2007-08-09 04:52:36 · 6 answers · asked by Mark M 1

2007-08-09 04:42:43 · 21 answers · asked by Bangers 1

Nikola Tesla found that the Earths resonant frequency is 7hz
How did he go about finding that?

2007-08-09 04:25:24 · 1 answers · asked by Anonymous

2007-08-09 04:11:51 · 1 answers · asked by Anonymous

• if the system accelerates 2.3 m from rest, how much work is done by gravity on the system?
• How can I use the definition of KE to identify the velocity of the system after having moved through the 2.3 m assuming that the system was released from rest.

so we have

m1 = 1 kg
m2 = 1.06 kg
x = 2.3 m
v0 = 0

2007-08-09 04:09:18 · 1 answers · asked by e=mc^2 1

What is the orbital KE of a satellite of mass 560 kg in circular orbit about a planet of mass 21 * 10 ^ 24 kg, orbiting at a distance of 47700 km from the center of the planet?
(G = 6.67 * 10 ^ -11 N m ^ 2 / kg ^ 2)

It also asked what would be the PE.

My question is pertaining to my formulas.
To determine the velocity I used
V = square root of ( G * M * m / radius )
KE = .5 * M * m * v ^2
PE = - G* M * m / R

M = mass of planet, (21 e 24 kg)
m = mass of satellite 560 kg
R = 47700 km

2007-08-09 04:02:57 · 1 answers · asked by Anonymous

Plz explain lucidly.

2007-08-09 03:38:05 · 5 answers · asked by Aqua 2

the potential energy of an object is given by U(x)= 3x^2-2x^3, where U is in joules and x is in meters.
a. determine the force acting on this object.
b. at what positions is this object in equilibrium/
c. which of this equilibrium positions are stable and which are unstable?

2007-08-09 03:20:51 · 1 answers · asked by la 1

2007-08-09 03:07:42 · 2 answers · asked by kiran d 1

Or maybe just unfortunate objects in the way? How does the lost charge in the thundercloud get replaced?

2007-08-09 03:06:11 · 6 answers · asked by duh 2

Just curious, you know.

2007-08-09 02:52:20 · 10 answers · asked by Gabe Devlin 1

magnet & other is magnetic material. How will you distuinguish between magnet & magnetic material without using any external devices?

2007-08-09 02:42:12 · 5 answers · asked by namesake 3

Let says i need to PUNCH a volleyball with the weight of 0.28kg at the angle of 68.8degree with a velocity of 9.5783m/s. Time taken is 0.75s and acceleration is 12.7712m/s^2. The maximum height of the ball must exceed 3.6m and a horizontal distance of 4.6m.
How do i calculate the collision force needed to carry out the above criteria ?

2007-08-09 02:24:36 · 1 answers · asked by Justin-san 2

heat rises... gravity pulls downwards

2007-08-08 21:45:42 · 11 answers · asked by precious 2

2007-08-08 20:17:42 · 2 answers · asked by bacardi and diet 2

if you could please tell me the average walking speed of a kid aswell please

2007-08-08 19:06:49 · 33 answers · asked by james Wilkins 1

2007-08-08 18:15:40 · 8 answers · asked by preethi shreeya 1

2007-08-08 17:24:17 · 6 answers · asked by GuyT7 2

A block-spring system oscillates with an amplitude of 3.50 cm. The spring constant is 250 N/m and the mass of the block is 0.600 kg.

A.Determine the mechanical energy of the system in Joules
B.Determine the maximum speed of the block (m/s)
C.Determine the maximum acceleration. (m/s^2)

I would truly appreciate help with these problem.

2007-08-08 15:58:00 · 5 answers · asked by Anonymous

What would be the most efficient frequency/medium to send energy collected by satellite to the earth's surface? (Assuming a mechanism can be derived to convert a useful amount of power from the solar spectrum present outside the atmosphere)
As so much more energy is available outside the atmosphere surely this is a future solution?

2007-08-08 15:46:18 · 8 answers · asked by Abyss Child X 5

2007-08-08 14:09:09 · 4 answers · asked by nightowl 2

if you could some how travel twice the speed of light away from earth, could you stop at any point, and look through some sort of telescope, and see your self leaving?

2007-08-08 13:11:40 · 5 answers · asked by Anonymous

a pendulum is released from rest at a displacement of .28 m from its equilibrium position. it is stopped abruptly and uniformly at its equilibrium position and it is observedthat a loose bit of metal slides without resistance of the pendulum and falls to the floor 2.06 m below.

if the projectile started off with a velocity in just its horizontal direction, and if travels .44 m in the horizontal direction during its fall, what was the velocity of the pendulum at equilibrium?

what is the period of motion of the pendulum?

2007-08-08 12:29:33 · 3 answers · asked by e=mc^2 1

What do you Believe is the Cause of Gravity?
Explain what you think it is, and how it may be Operating.

2007-08-08 12:17:13 · 6 answers · asked by Anonymous

2007-08-08 12:14:24 · 3 answers · asked by bsko24fast 1

I don't see how there could ever be a limit to how small Anything could Get, Wouldn't it Be possible to take half of a measurement, and keep dividing it in half for Eternity, and Never ever have an end?

2007-08-08 12:11:34 · 9 answers · asked by Anonymous

:) thx!

2007-08-08 11:16:09 · 2 answers · asked by the_pink_dahlia 1

2007-08-08 11:06:28 · 1 answers · asked by Anonymous

Since the fluc. known as time depends on the over all weight, therby gravity of the universe, how would its expanision effect time.

2007-08-08 08:37:30 · 5 answers · asked by Anonymous